/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package servlets;

import ejbs.MessageQueueLocal;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ejb.EJB;
import javax.servlet.http.HttpSession;
import utils.Menu;
import utils.MenuItem;

/**
 *
 * @author vasi
 */
public abstract class BaseServletController extends HttpServlet implements ISystemAccess {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    
    @EJB MessageQueueLocal msg;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        //response.setContentType("text/html;charset=UTF-8");
        //PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet BaseServletController</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet BaseServletController at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
            */
            //Just check if there is an user in the session and make it available in the request.
           HttpSession session = request.getSession();
           if (session.getAttribute("user") != null){
                request.setAttribute("user", session.getAttribute("user"));
           }
           //Construct the menu to be displayed.
           Menu menu = new Menu();
           if (session.getAttribute("user") != null){
               menu.addItem(new MenuItem("All content", "/content/list"));
               menu.addItem(new MenuItem("Favorites", "/content/favorites"));
               menu.addItem(new MenuItem("My Profile", "/user/profile"));
           }
           request.setAttribute("menu", menu);
           doRequest(request, response);
        } finally { 
            //out.close();
        }
    }

    public abstract void doRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException;

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
